README
^^^^^^
This README provides some information about the port of NuttX to the TI
Hercules TMS570LS04x/03x LaunchPad Evaluation Kit (LAUNCHXL-TMS57004)
featuring the Hercules TMS570LS0432PZ chip.
Contents
^^^^^^^^
- LEDs and Buttons
- Serial Console
- Configurations
LEDs and Buttons
================
LEDs
----
The launchpad has a four LEDs two power LEDs labeled D1 (red) that
connects to the TMS570's NERROR pin and D7 (blue) that indicates the
XDS200 POWER_EN signal, and two white, user LEDs labeled D12 that
connects to the NHET08 pin and D11 that connects to GIOA2.
NHET08 is one of 32 N2HET pins than can be available to the user if
not used by N2HET. This implementation, however, uses only the single
LED driven by GIOA2. That LED is tied to ground and illuminated
with a high level output value.
This LED is not used by the board port unless CONFIG_ARCH_LEDS is
defined. In that case, the usage by the board port is defined in
include/board.h and src/tms570_autoleds.c. The LED is used to encode
OS-related events as follows:
------------------- ----------------------- ------
SYMBOL Meaning LED
------------------- ----------------------- ------
LED_STARTED NuttX has been started OFF
LED_HEAPALLOCATE Heap has been allocated OFF
LED_IRQSENABLED Interrupts enabled OFF
LED_STACKCREATED Idle stack created ON
LED_INIRQ In an interrupt N/C
LED_SIGNAL In a signal handler N/C
LED_ASSERTION An assertion failed N/C
LED_PANIC The system has crashed FLASH
Thus if the LED is statically on, NuttX has successfully booted and is,
apparently, running normally. If the LED is flashing at approximately
2Hz, then a fatal error has been detected and the system has halted.
Buttons
-------
The launchpad has three mechanical buttons. Two of these are reset buttons:
One button is labeled PORRST performs a power-on reset and one labeled RST
performs an MCU reset. Only one button is available for general software
usage. That button is labeled GIOA7 and is, obviously, sensed on GIOA7.
GIOA7 is tied to ground, but will be pulled high if the GIOA7 button is
depressed.
Serial Console
^^^^^^^^^^^^^^
This TMS570 has a single SCI. The SCI_RX and TX pins are connected to
the FTDI chip which provides a virtual COM port for the launchpad.
Configurations
==============
Information Common to All Configurations
----------------------------------------
Each LaunchXL-TMS50704 configuration is maintained in a sub-directory and
can be selected as follow:
cd tools
./configure.sh launchxl-tms57004/<subdir>
cd -
. ./setenv.sh
Before sourcing the setenv.sh file above, you should examine it and perform
edits as necessary so that TOOLCHAIN_BIN is the correct path to the directory
than holds your toolchain binaries.
And then build NuttX by simply typing the following. At the conclusion of
the make, the nuttx binary will reside in an ELF file called, simply, nuttx.
make oldconfig
make
The <subdir> that is provided above as an argument to the tools/configure.sh
must be is one of the following.
NOTES:
1. These configurations use the mconf-based configuration tool. To
change any of these configurations using that tool, you should:
a. Build and install the kconfig-mconf tool. See nuttx/README.txt
see additional README.txt files in the NuttX tools repository.
b. Execute 'make menuconfig' in nuttx/ in order to start the
reconfiguration process.
2. All of these configurations are set up to build under Windows using the
"GNU Tools for ARM Embedded Processors" that is maintained by ARM
(unless stated otherwise in the description of the configuration).
https://launchpad.net/gcc-arm-embedded
That toolchain selection can easily be reconfigured using
'make menuconfig'. Here are the relevant current settings:
Build Setup:
CONFIG_HOST_WINDOWS=y : Window environment
CONFIG_WINDOWS_CYGWIN=y : Cywin under Windows
System Type -> Toolchain:
CONFIG_ARMV7M_TOOLCHAIN_GNU_EABIW=y : GNU ARM EABI toolchain
Configuration sub-directories
-----------------------------
nsh:
Configures the NuttShell (nsh) located at examples/nsh.
